trigonometric function –noun Mathematics . 1. Also called circular function. a function of an angle, as sine or cosine, expressed as the ratio of the sides of a right triangle.
2. any function involving only trigonometric functions and constants.
3. the generalization of these to functions of real or complex numbers.
Origin: 1905–10
Science Dictionary
trigonometric function Pronunciation Key
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The American Heritage® Science Dictionary
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(trĭg'ə-nə-mět'rĭk) Pronunciation Key
